Internet Engineering Task Force (IETF) R. Housley
Request for Comments: 6318 Vigil Security
Obsoletes: 5008 J. Solinas
Category: Informational National Security Agency
ISSN: 2070-1721 June 2011
Suite B in Secure/Multipurpose Internet Mail Extensions (S/MIME)
Abstract
This document specifies the conventions for using the United States
National Security Agency's Suite B algorithms in Secure/Multipurpose
Internet Mail Extensions (S/MIME) as specified in RFC 5751. This
document obsoletes RFC 5008.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6318.
Housley & Solinas Informational [Page 1]RFC 6318 Suite B in S/MIME June 2011Copyright Notice
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Table of Contents
1. Introduction ....................................................3
1.1. Terminology ................................................4
1.2. ASN.1 ......................................................4
1.3. Suite B Security Levels ....................................4
2. SHA-256 and SHA-384 Message Digest Algorithms ...................5
3. ECDSA Signature Algorithm .......................................6
4. Key Management ..................................................7
4.1. ECDH Key Agreement Algorithm ...............................7
4.2. AES Key Wrap ...............................................8
4.3. Key Derivation Functions ...................................9
5. AES CBC Content Encryption .....................................11
6. Security Considerations ........................................12
7. References .....................................................13
7.1. Normative References ......................................13
7.2. Informative References ....................................14
Housley & Solinas Informational [Page 2]RFC 6318 Suite B in S/MIME June 20111. Introduction
The Fact Sheet on National Security Agency (NSA) Suite B Cryptography
[NSA] states:
A Cryptographic Interoperability Strategy (CIS) was developed to
find ways to increase assured rapid sharing of information both
within the U.S. and between the U.S. and her partners through the
use of a common suite of public standards, protocols, algorithms
and modes referred to as the "Secure Sharing Suite" or S.3. The
implementation of CIS will facilitate the development of a broader
range of secure cryptographic products which will be available to